The Raiders signed 11 undrafted free agents, including Notre Dame running back George Atkinson III. His dad, fans know, was hard-hitting safety George, who spent 10 seasons (1968-77) with the Raiders.

Atkinson III, who ran a 4.48 40-yard dash at the NFL combine, played three seasons at Notre Dame, appearing in 37 games. He ran for 943 yards on 153 attempts with 10 touchdowns. He was suspended for the Irish's bowl game last season because he wouldn't get off his cell phone when his coach asked.

Raiders general manager Reggie McKenzie said he wanted to draft a receiver last week but the board didn't fall that way. So he signed four receivers, who were on the field for the start of rookie minicamp Friday.

Grigsby appeared in 40 games for the Spartans and finished as the school's all-time leader with 3,121 receiving yards on 237 receptions with 17 touchdowns. He also set the school's single-season record with 89 receptions as a sophomore in 2011.